Patent GB-109637-A (GB)
Title: Improvements in Advertising and other Devices, provided with Parts adapted to be Brought into Successive Positions.
Inventor: HARRIS HENRY KINGSFORD
IPC: G09G3/00
Filed: 1916-08-18
Abstract: 109,637. Harris, H. K. Aug. 18, 1916. Reel and web apparatus; rotary disk and like apparatus; plates and the like, travelling.-The invention comprises modifications of the invention described in Specification 20597/13 relating to (a) the construction of the reel and web apparatus. (b) the construction and operation of the selector mechanism, (c) the construction of the electric switches for reversing the direction of the current to the driving motor, and (d) the provision of a mechanical reversing gear instead of an electric switch for reversing the current through the motor. Reel and web apparatus. The band carrying advertisements or other indications is mounted on two drums c, e, Fig. 2, as described in the prior Specification, the lower drum e being driven from the motor g through worm gearing p and bevelgearing k, m, and a brake shoe s controlled by an electro-magnet w is arranged in the motor circuit, so that the brake is brought into action as soon as the motor ceases running. Two or more pins 21 on the drum are arranged to drive the counting- wheel 13 of the selector mechanism intermittently through a slotted wheel 20 and bevel-gearing 18, 19, so that the selector wheel 13 moves in unison with the drum e. Construction and operation of the selector mechanism. The selector wheel 14 is arranged to rotate independently of, but on the same axis as the counting wheel 13, and is operated by a pawl 26, Fig. 3, actuated by electric impulses transmitted to a solenoid 33 and an electro-magnet 34 preferably arranged in series. When a weak impulse is transmitted, the electro-magnet 34 alone operates and the wheel 14 is advanced unit space; when a strong impulse is transmitted, the solenoid 33 also comes into operation and the wheel 14 is advanced a multiple of unit distance, thus providing for rapid movement of the selector wheel when the number of spaces is large. The wheel 14 is spring controlled and returns to its zero position as determined by an arm 37 and a fixed stop 38 when a release electro-magnet 36 is energized. The wheel 14 carries two contacts 1 connected to the motor terminals and adapted to move over two segments 39, 40 with insulated gaps between them on the wheel 13. The motor circuit is broken when the contacts 1 rest on the insulated gaps, that is, when the counting wheel and selector wheel are both at their zero or at corresponding positions; in other relative positions, the segments 39, 40 form with the contacts 1 a commutator switch to determine the direction of the current through the motor. In operation, the selector wheel is set to the required indication, the motor circuit is then closed and the drum e and counting-wheel move in unison until the counting-wheel reaches the same indication, when the motor circuit is broken and the drum stops. The selector wheel is then automatically returned to its zero position so that, in setting a. new indication, the previous indication is automatically taken into account, and a standard number of impulses for a particular indication must be sent from the transmitting station. Fig. 4 shows a circuit arranged for operating a series of advertising units, two of which are shown in the Figure. The unit selector arm 54, controlled by an electro-magnet 55 is moved over contacts 51, 52 connected with the units, and the selector-wheels of the units are set in turn by impulses sent through the solenoids 33 and electro-magnets 34 over the wire 57. The arm 54 finally reaches the end contact 58 and closes, through a switch 64 controlled by a solenoid 61, a circuit embracing the motor windings, the electro-magnets w controlling the brakes, and the motor armatures g, thus driving the various bands to their selected indications. When this stage is attained, the electro-magnets w close switches 65, 65<1> and complete a circuit through a solenoid 66 and operate a switch arm 67 having a dash-pot 70 to give a slow return movement of the arm. The arm 67 closes two circuits, one through the release magnets 36<1>, 36<2> to restore the selector wheels to their original positions, and one through a solenoid 71 to restore the unit selector arm 54 to its initial position and break the circuit through the switch 64. The switch arm 67 during its attracted movement passes over an insulating portion 68, Fig. 5, of the contact 69<1> and during its slow return movement over a conducting portion 69. The selector and counting devices may consist of racks, bars, or quadrants instead of wheels and. may be used to control a series of cards, plates, or disks instead of a reel and web apparatus and the electric impulses may be controlled by a punch tape at the transmitting station. The arm 54 may also be arranged to make contacts to signal to the transmitting station when all the units have been set to their selected positions. A catch controlled by a solenoid in the motor circuit may be provided to prevent rotation of the selector wheel 14 with the wheel 13. The selector wheel may be set by hand instead of electrically. Construction of the electric reversing-switches. In place of the switch comprising the segments 39, 40, a switch having contacts 74, 75 and 76, 77, 78, 79 connected as shown in Fig. 16 may be mounted on the counting-wheel 13, Fig. 15, the sets of contacts 74, 75 or 76, 77, 78, 79 which make contact with another set of contacts 80 being determined by an arm 83 on the selector wheel 14. A single contact 81 on the wheel 14 moves over a conducting ring 82 which has an insulating gap and is mounted on the counting wheel 13. The switch is connected in circuit as shown in Fig. 14, and combined with a controlled catch 84 engaging a flange 85 with a cam 87 on the drum e. When the motor circuit is closed after setting the selector wheel, the solenoid 83' is energized and releases the catch 84 and closes a contact 88, which allows the motor to revolve for a short period after the contact 81 has reached the insulating gap on the ring 82 and until the catch 84 again comes opposite a hole in the flange 85, when the alternative motor circuit is broken at 88. This provides an arrangement for locking and ensuring true positioning of the indication band. The reversing switch shown in Fig. 16 for the motor armature is indicated at 73. Another form of switch is shown in Fig. 18, and comprises a rocking arm 95 having contacts 97, 98 connected with the motor terminals and adapted to co-act with contacts 101, 103 or 102, 104 according to the position of an extension of the arm 95 in a camshaped slot 94 on one of the wheels 13 or 14. A spring roller 96 holds the arm in either of its extreme positions. Mechanical reversing-gear. The motor is arranged to drive a wheel 105<x> mounted loosely on the shaft 109, Fig. 21, of the drum e and combined with bevel-wheels 107, 108. A shaft 111 is carried by a sleeve 114 keyed to the shaft 109, and shaft 109 and has an extension 118 at one end and a bevel-wheel 112 at the other end. When the extension 118 is held rigid, the shaft 109 is driven in the opposite direction to the wheel 105<x> through the bevel-gearing 107, 112, 113, the last mentioned wheel being keyed to the shaft 109. At the other side of the wheel 105<x>, a shaft 115 is carried by a sleeve 114 keyed to the shaft 109, and a bevel-wheel 117 carries an extension arm 119. When the arm 119 is held rigid, the shaft 109 is driven in the same direction as the wheel 105<x>. Thus, according to whether the extension 118 or the arm 119 is held, the shaft 109 rotates in one direction on the other, the remaining gear running free. The arm 118 or 119 to be held is determined by a rocking abutment lever 128 controlled either mechanically from a cam surface 120 on the selector wheel or electrically.